Monday is expected to be a very busy day for delivery services. In fact, FedEx is anticipating its busiest shipping day in company history.

This holiday season, FedEx says online shipping is prompting a major increase in the number of packages that are being shipped out.

On Monday, the company is expecting to ship a record-breaking 22.6 million packages.

To manage the volume, FedEx has increased its workforce.

UPS says it is also preparing for a busy day of shipments. It expects to deliver more than 585 million packages this month, which is an 11 percent increase over last year.

The U.S. Postal Service is also encouraging customers to get their packages in the mail as soon as they can.

Monday is the deadline to guarantee that items shipped standard post will make it to their destinations in time. The postal service plans to process more than 640 million cards , letters and packages, which is 33 million more than last year.

If you cannot make it to the post office, you can still ship your packages by using the postal service's "click n ship" feature on its website.

Saturday is the deadline for first class mail like greeting cards and letters.